<template>
  <div :class="classes">
    <div :class="headClasses" v-if="showHead">
      <slot name="title">
        <p v-if="title">
          <oolongIcon v-if="icon" :type="icon"></oolongIcon>
          {{ title }}
        </p>
      </slot>
    </div>
    <div :class="extraClasses" v-if="showExtra">
      <slot name="extra"></slot>
    </div>
    <div :class="bodyClasses" :style="bodyStyles">
      <slot></slot>
    </div>
  </div>
</template>
<script>
import oolongIcon from '../icon';

const prefixCls = 'oolong-panel';
const defaultPadding = 16;

export default {
  name: 'oolongPanel',
  components: {oolongIcon},
  props: {
    bordered: {
      type: Boolean,
      default: true
    },
    disHover: {
      type: Boolean,
      default: false
    },
    shadow: {
      type: Boolean,
      default: false
    },
    padding: {
      type: Number,
      default: defaultPadding
    },
    title: {
      type: String
    },
    icon: {
      type: String
    }
  },
  data() {
    return {
      showHead: true,
      showExtra: true
    };
  },
  computed: {
    classes() {
      return [
        `${prefixCls}`,
        {
          [`${prefixCls}-bordered`]: this.bordered && !this.shadow,
          [`${prefixCls}-dis-hover`]: this.disHover || this.shadow,
          [`${prefixCls}-shadow`]: this.shadow
        }
      ];
    },
    headClasses() {
      return `${prefixCls}-head`;
    },
    extraClasses() {
      return `${prefixCls}-extra`;
    },
    bodyClasses() {
      return `${prefixCls}-body`;
    },
    bodyStyles() {
      if (this.padding !== defaultPadding) {
        return {
          padding: `${this.padding}px`
        };
      } else {
        return '';
      }
    }
  },
  mounted() {
    this.showHead = this.title || this.$slots.title !== undefined;
    this.showExtra = this.$slots.extra !== undefined;
  }
};
</script>
